<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div>这里是foo页面</div>
  </body>
  <script>
    window.addEventListener('load', () => {
      let currentState = history.state
      console.log('currentState', currentState)
    })
    window.addEventListener('popstate', function (state) {
      // alert('触发了popstate！')
      console.log('触发了【【foo】】页面的popstate！--state==', history.state)
    })
  </script>
</html>
